Trolley pole



Oct. 22, 1929. A. PRELESNIK TROLLEY POLE Filed Jan. 23, 1928 3 Sheets-Sheet INVENTOR nien Prelesni/' A9. Q, JAW

WITNESS:

ATTOFNEY Oct. 22, 1929. A. PRELEsNlK TROLLEY POLE Filed Jan. 25, 1928 5 Sheets--Sheekl ATTORNEY A WITNESS:

3 Sheets-Sheet nozr /Treicnsrz/- INVENTOR ATTO RN EY WITNESS:

Patented Oct. 22, 1929 LUNITED STATES ANTON PRELESNIK, OF MILWAUKEE, WISCONSIN TROLLEY POLE Application med January 2s, 192s. serial No. 248,824.

This invention has relation to trolley poles and mountings therefor.

An object of the invention comprehends I means adapted to permit limited lateral movement of the pole to follow the power line when the car sways while rounding bends.

Another object of the` invention contemplates a break for the pole. j

A further object of the invention embodies a trip mechanism adapted for use in conjunction with the pole to release the latter from an operative position when the pole encounters high and low spots in the power line. An additional object of the invention consists of a cushion member located in the path of movement of the pole to catch the latter upon its descent. Y l

With the above and other objects in view, the invention further consists of thel follow- 2o' ing novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claims. In the drawings l Figure 1 is an elevation of my invention while in use.

Figure 2 is a similar view when the pole is broken and released for engagement with the cushion. v 3o Figure 3 is a sectional view taken on line 3-3 of Figure 2. i

Figure 4 is a vertical sectional View take on line 4-4 of Figure 2. f

. Figure 5 is a top plan v1ew of the turn' y' table. f

Figure 6 is a vertical sectional view taken through a locking means for the turn-table.

Figure 7 is a sectionalview taken on line 7 7 of Figure 2 through the trip mecha- 40 nism omitting the spring.

Figure 8 is a perspective view of the release apparatus embodied in the trip mechanism.

It is' generally known in the use of overhead power lines that the harps carried upon trolley poles frequently become disengaged from the current or power lines when encountering high or low spots therein. When a trolley polebecomes disengaged, the same flies up and is likely to' strike against cross arms or rafters, as in the instance of mine trolleys. In the event the pole strikes the power line, short circuits are likely to occur which will ground the chassis of the car and endanger the lives of occupants thereof.

To overcome these grave diiiculties as generally experienced, I provide a base 10 having a standard 11. A flange 12, carried` by the standard 11 and having elongated slotted portions 13 upon diametrically opposite sides thereof, is adapted to provide a turn table, the purposeof which will be presently apparent.

A fulcrum shaft 14, upstanding from the standard 11 and centrally of theturn .table j 12` terminates to provide a bifurcated ex- 65 tremity 15. An ear 16, projected from a housing 17, carryin a trolley pole section18, is pivotally mounted, as indicated at 19, within said bifurcations 15. A pole section 20, having a knuckle joint 21 upon` one end, is -70 adapted for pivotal connection with a complemental knuckle joint 22, carriedtuponthe adjacent end of the pole section 18. A trolley wheel or harp 23 is carried uponthe remaining end of the trolley polefsection 20.`

A plate member 24, adapted to receive the upstanding fulcrum shaft 14 therein,is mounted for rotary movement upon the turn table 12. A spring detent locking plunger 25, operable within a housing 26, upstanding from the plate member 24, is adapted for connection at the uppermost endv thereof with a locking lever 28, pivotally mounted upon an ear 29 in the manner as best illustrated' in Figure 6.ofthe drawings. The S5 plunger 25 is adapted for reception within either oneof the elongated slotted portions 13 in the turn table 12. The elongated slots permit of the limited lateral movement to the harp to follow the sway of the trolley line. The plate member 30, establishing connection between the plate member 24 and upstanding fulcrum shaft 14, supports side flanges 31 upon the side edges thereof. The forward sideedges of said flanges 31 have 95- portions removed or pockets, such as indi.- cated at 32, the purpose of which will be presently apparent. Aretractile spring 33, adapted Vfor connection, at one endwith'a U-bolt 34, carried upon one end of thel plate within the portions removed or pockets 32 in the adjacent portions of the flanges 31.

An ear 39, upstanding from the housing 17, isl provided with a pocket 40,7adapted to receive a stud 4l within the trip mechanism 36..

A guidemember 42, mounted' within the forward endA of the' tripl mechanism 36 isadapted for engagement with the ear 39 when the same is shifted for use in conjunction y therewith'. Studs 43, carried" by the ear t),

are adapted to cooperate with the pocket 40, While engaged with the trip mechanism,

asbestA illustrated in Figure l of the drawings. Thus far, from the foregoingdescripf tion and accompanying drawings, it is to be notedthatv I have provided al trolley pole apparatus which may be swung to occupy reverse directions to-perrnit retrograde movementof Ythe vehicle without turning the latter around. ltis to b enoted that the knuckle joint', as provided betweentlie trolley pQle sections, willbreak the pole at the joint when thev car encounters low spots in tlie'roadV bed.

i Thereve'rse action ofthe spring will cause.

the studsf43 tollift' the trip mechanism 36 upon the undersdc4 thereof to release the pin 41 from-the pocket 40 in tlie ear 39; rlhe money p01@ sections, already 'folate 0i! kiiockeddown will fall within and upon an arm 44' having ashaft 45 extended within aD housing 561 compression spring 47, mountedv wi thin the housing 46, is frictionally engaged with a collar,` member 48, carried by the shaft 45, within the housing 46.y The trolley p ole sections, when released from theytrip mechanism, will fall upon the arm 44 and the shockof'their descent will be checked by the ispringy47, A pin49, projecting from the-collar 48, extended withinfa vertically'disposed slot 50y and the housing 4G to prevent lateral shifting movement of the arm 44, whereby the latter will be always lo.- cated in the path of movement of the trolley i polel sections when descending.

The invention will prove highly advan-VV tageous to mining concernsv who install temporary trolley lines whichl arer not generally straight and the high and lower spots in the road. bed make, the 'Ordinary P01@ jump. away from the trolley against beams and rafters, throwing Ysplinters therefrom inthe vicinity of motorrnen and' brakememthereby mal;-

ig/ their PQStQnS. dangerous and endangering, @he men, C9 the POsSbllty of. a Shcki if the pole should drag against the current wire.

As best illustrated in Figure l of the drawings, the ear 39 is in addition provided with a projection 51, extended for an appreciable distance higher than the pocket 40. This projection is adapted to engage the pin 4l when the trolley pole section 20 folds upon the pole section 18. Such movement releases the pin 41 from the projection .Bland due to the fact that4 the projection is located at a higher level than the pocket 40, downward swinging movement of the folded sections of the trolley pole will carry the ear 39 past the pin 4l and repose upon the arm 44.

The invention may be properly termed a safety device, in that the pole 1S adapted to Vbreak in the mid, section"afterleavingI the current wire and automatically," drops on a cushion and is absolutely out of the way of the current wirekor other obstructionsthat occur in electric line building. fAlvso, the lives ofthe operators' of tlietrolley calls, yare not endangered when the vcar is run forward vor reverse motionA as the pole lis adapted to be turned yin as small all areal as the width of the area. within-w'lijiclithe4 car inayoperate. vWhen the trolley pole breaks, it' falls uponv the spring cushion and can not swing around, lniockingtheA {I lOQrman off the car, because the locking` device preventsy undue lateral4 shifting* movement of the plate member upon the turntable.

If, by chance, the Operator` 0r' b-Ikcman of the car forgets to swing. the pole, around when backing' up, the, pole automatically breaks and will not work withthe pulley or harp facing him. j

lThe pole upon being for use is automatically locke'dfwhereby the pole will run upon the line butin the Vevent the pole leaves the line, for anycause/tl'ie pole. will swing for an appreciableJr distance above the line causingthe trip mechanism to release and tlie momentum attained will beA sufficient toswing the pole sections. upon-the hinge connection whereby the wholeas'sembly will fall upon the arm 44 ijn an; out of the way position. Y Y K Y l* llie invention issusceptible ojf'various changes in its form, proportions and minor.. details of construction. and thc right. iclielicin reserved to make suchV changesas properly fall within the scope-of the appendedclaims."

Having described` the invention, what is claimed is z- I l l. A trolley pole construction a turn table, a plate member rotatably mount.-

ed thereon, a Setional poylermnounted upon thc turn table above 'said plata a trip, mech: einem located adjacent they pole mounting and adapted for connection therewtlitc nur? mally sustain4 the., pole .in Vfpositfion. ft use,

a spring member establishing connection l5@- twcen the plate Inclnbcr w1,1. lftriu A mechanism adapted to, yieldingly retain thek pole, in `the arranged in position,

icing' aforementioned position and to cooperate with the pole to automatically occupy an inoperative position when the pole leaves the trolley line, and means for lockingly engaging the plate member with the turn table.

2. A trolley pole construction comprising a base having a Standard, a turn table carried by the standard, a fulcrum shaft mounted upon the turn table, a sectional pole mounted upon the fulcrum shaft, an ear projected from the mounting and having a pocket therein, a trip mechanism located adjacent said mounting and having a pin adapted for receptionwithin said pocket to normally sustain the trolley pole in position for use, a plate member rotatably mounted upon the turn table, a retractile spring establishing connection between the plate member and trip mechanism adapted to yieldingly retain the pole in the aforementioned position, a projection carried by the ear at an appreciable height above said pocket and adapted to be shifted for engagement with said pin to automatically release the ear and pole mounting from the trip mechanism when the pole leaves the trolley line, and means for lockingly engaging the plate member With the turn table.

In testimony whereof I aiix my signature.

ANTON PREESNIK. 

